bakaid commented on a change in pull request #610: MINIFICPP-814 - Fixed 
ListenHTTP and HTTPClient bugs, created tests f…
URL: https://github.com/apache/nifi-minifi-cpp/pull/610#discussion_r312965763
 
 

 ##########
 File path: extensions/http-curl/client/HTTPClient.cpp
 ##########
 @@ -148,6 +161,52 @@ void HTTPClient::setDisableHostVerification() {
   curl_easy_setopt(http_session_, CURLOPT_SSL_VERIFYHOST, 0L);
 }
 
+bool HTTPClient::setSpecificSSLVersion(SSLVersion specific_version) {
+#if CURL_AT_LEAST_VERSION(7, 54, 0)
+  CURLcode ret = CURLE_UNKNOWN_OPTION;
+  switch (specific_version) {
+    case SSLVersion::SSLv2:
+      ret = curl_easy_setopt(http_session_, CURLOPT_SSLVERSION, 
CURL_SSLVERSION_SSLv2);
 
 Review comment:
   I am changing this to exclude SSLv2 and SSLv3, so only outgoing connections 
with TLSv1.0, TLSv1.1 and TLSv1.2 will be supported.
   However, ListenHTTP's SSLMinimumVersion property (and the underlying 
implementation) supports every version from SSLv2 to TLSv1.2. While I 
completely agree with the approach of only allowing TLSv1.2 for incoming 
connections, this would mean an API change and a deprecation, which I am quite 
sure can not be made in 0.6.1 and not sure how it can be made in 0.7.0.
   @phrocker What are your thoughts on this?

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